Igniter, ignition device and ignition method

Abstract

The invention provides an igniter, an ignition device and an ignition method. The igniter comprises an igniter body, a heating unit, a first conduct piece, a second conduct piece and insulation heat conduct pieces. A first chamber is formed in the igniter body, the heating unit is arranged in the first chamber, a first annulus is formed between the heating unit and the igniter body, and the heating unit is electrically connected with the igniter body. A second chamber is formed in the first conduct piece and the first conduct piece is connected with the igniter body. The second conduct piece is arranged in the second chamber, a second annulus is formed between the second conduct piece and the first conduct piece, and the second conduct piece is connected with the heating unit. The insulation heat conduct pieces are arranged in the first annulus and the second annulus. The igniter, the ignition device and the ignition method can be applied in horizontal well sections, the in-situ combustion process and the ignition process are not limited by the length of the horizontal well sections, and also the ignition is even, the ignition length is larger, and the ignition chamber growth is stable.

Description

technical field [0001] The present application relates to the field of oil and gas field exploitation, in particular to an igniter, an ignition device and an ignition method. Background technique [0002] The descriptions in this section merely provide background information related to the disclosure in this application and may not constitute prior art. [0003] At present, most of the ignition operations are carried out in the vertical well section when implementing the combustion oil layer technology. However, when the ignition operation is performed in the vertical well section, the sweep length of the ignition section is relatively short, so it is generally only applicable to the short horizontal well section. Specifically, when the ignition operation is performed in the vertical well section, the igniter is generally located in the vertical well section. When the horizontal well section is long, it often happens that the oil layer near the igniter is heated or has a h...

AI Technical Summary

Problems solved by technology

In this way, uneven heating of the oil layer may lead to uneven distribution of the fire cavity after ignition, and the fire line develops along the local horizontal well section of the oil layer, causing oxygen breakthrough in the production well in advance

Once the production well sees oxygen, it can only be forced to shut down, otherwise wellbore explosion accidents will easily occur, which is not good for oilfield development

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